Client libraries are no longer included with redis, so updated README to point to the redis client library
Client libraries are no longer included with redis, so updated README to point to the redis client library

zl352773277/django-redis,markng/django-redis-cache,sebleier/django-dredis-cache,smahs/django-redis,maikelwever/django-redis-cache,maikelwever/django-redis-cache,chripede/django-redis-cache,GetAmbassador/django-redis,lucius-feng/django-redis,carltongibson/django-redis-cache,issackelly/django-redis-cache,yanheng/django-redis,chripede/django-redis-cache,carltongibson/django-redis-cache